Add some unique style to your RC drift car with these easy to install LED wheel lights! Featuring a bolt-on design, these wheel lights are super easy to install and use. The design incorporates a 12mm hex hub into the LED unit, so you just need to slide these over the axles, then bolt on the wheel. The LED lights are motion activated, so you will not need to remove the batteries or turn anything off when your car is not in use.  These will fit 1/10 scale wheels with 12mm hex hubs (pin style).   Specs. LED Color: Blue Power Source: AG1 button cell battery x 2 (per unit) (batteries included) Main board size: 34x32mm Weight: 2.5g each